I have never given this a lot attention. I learned a few things from the post and I am always grateful for that. One question that popped into my head is th

I have never given this a lot attention. I learned a few things from the post and I am always grateful for that. One question that popped into my head is that with that having a fleet that big the company must be rather vulnerable if the number of packages decreases significantly over even a small amount of time. Operating a fleet like that, and probably have lot of flights that cannot be canceled, to save money, given the propagation problems that would create downstream. In a highly improbable hypothesis of a day without any package at all, the cost must be in the two digit millions I dont think there is ever a day without packages but there are slow days and incredibly busy days.